Hi Trebor. I'm Greg, an installation specialist and 9 year Windows MVP, here to help you.
Try the Intellitype Keyboard software here to program function keys:
https://support.microsoft.com/en-us/help/237179...
Also see if the marked Answer here works:
https://answers.microsoft.com/en-us/windows/for...
I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.
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